scarce supplies at the grocery stores, now running out. but i want to turn to david muir, he drove into tokyo last night, through the night, as i did, and we were saying, david, the more the government goes on the air to say stay calm, we're sorry, but stay calm, the less calming it is. >> reporter: and that's exactly what the prime minister said last night, diane. stay calm, but then he warned of possible more radiation to come. you spoke of the hundreds of thousands of evacuees now headed away from the nuclear power reactors. that have caused so much trouble. now, the question about the band of workers who stayed behind. at what risk? the line of cars stretched for miles. a race to get out of the danger zone. 200,000 people and counting trying to get away from those battered nuclear reactors. evacuation shelters had trouble keeping up. and many people in the shadow of those reactors are now terrified and angry. this man said nuclear power is the most frightening thing, more than the tsunami. the government, nobody tells us, the citizens, what is really happening.